電流分布の多様性が拓く環状プラズマの新しい世界-平衡・閉じ込め研究への展開-2.トカマクにおける電流分布の多様性 2.2 電流ホール配位の形成機構と閉じ込め特性
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- 滝塚 知典
- 日本原子力研究所那珂研究所
書誌事項
- タイトル別名
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- Variations of Current Profiles in Tokamaks Formation Mechanism and Confinement Property of Current-Hole Configuration
- 電流ホール配位の形成機構と閉じ込め特性
- デンリュウ ホールハイイ ノ ケイセイ キコウ ト トジコメ トクセイ
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説明
The formation mechanism of the current hole in tokamak plasmas is reviewed. Experimental results of JT-60U are shown. Increase of the off-central noninductive current is a key factor for the current-hole formation. The internal Transport Barrier (ITB), which generates large bootstrap current, plays an important role. The central current density in the hole stays nearly 0. The idea of a new equilibrium for a tokamak plasma with a current hole is introduced. This equilibrium configuration called ”Axisymmetric Tri-Magnetic-Islands(ATMI) equilibrium”, has three islands along the R direction (a central-negative-current island and side-positive-current islands). The equilibrium is stable with the elongation coils when the current in the ATMI region is limited to a small amount. The confinement properties of a current-hole configuration withbox-type ITB is described. A scaling of the core poloidal beta inside the ITB, βp,core is given as εfβp,core ≈ 1,which suggests the equilibrium limit (εf : inverse aspect ratio at the ITB foot). Though the core stored energy is little dependent on the heating power, the estimated heat diffusivity in the ITB region moderately correlates with a neoclassical diffusivity.
収録刊行物
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- プラズマ・核融合学会誌
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プラズマ・核融合学会誌 79 (11), 1123-1129, 2003
社団法人 プラズマ・核融合学会
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詳細情報 詳細情報について
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- CRID
- 1390282681488777088
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- NII論文ID
- 10012471164
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- NII書誌ID
- AN10401672
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- COI
- 1:CAS:528:DC%2BD3sXpvVSgtLc%3D
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- NDL書誌ID
- 6777324
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- ISSN
- 09187928
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可